Processed electroencephalogram during combined extradural and general anaesthesia.

Abstract:

:The processed electroencephalogram (pEEG) was monitored in eight patients undergoing gynaecological laparotomy under combined extradural and nitrous oxide-isoflurane anaesthesia. Pre-incisional mean spectral edge frequency 95 percentile (SEF95) and median frequency (MF) were 11.67 (SD 1.63) Hz and 3.74 (0.24) Hz, respectively. After skin incision, both SEF95 and MF decreased to 6.61 (2.04) Hz and 2.72 (0.32) Hz, respectively (P < 0.001). An increase in mean arterial pressure after incision suggested inadequate depth of anaesthesia. After introduction of extradural analgesia, these variables returned to pre-incisional values (SEF95 11.65 (1.73); MF 4.02 (0.41)). Reduction of end-tidal isoflurane from 1.0% to 0.5% after extradural analgesia did not cause significant pEEG changes. pEEG may assist anaesthetists to recognize adequacy of combined general-extradural anaesthesia.

journal_name

Br J Anaesth

authors

Kiyama S,Tsuzaki K

doi

10.1093/bja/78.6.751

subject

Has Abstract

pub_date

1997-06-01 00:00:00

pages

751-3

issue

6

eissn

0007-0912

issn

1471-6771

pii

S0007-0912(17)39946-4

journal_volume

78

pub_type

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